Choose your products based on ingredients, your hair properties and humidity/ dew points first and foremost, reviews and recommendations secondary. If you don't know out hair properties or dew points any recommendations are largely meaningless.

If you are getting build up go over the ingredients of all the products you are using and look for culprits - for example silicones, polyquats, butters, higher amounts of fatty alcohols - if you aren't sure post up the full ingredients lists, your hair properties and dew points here.
2a-2c, medium texture, porous/ colour treated. Three years CG. Past bra strap length heading for waist.

CO-wash: Inecto coconut/ Elvive Volume Collagen
Treatments: Komaza Care Matani, coconut/ sweet almond oils, Hairveda Sitrinillah
Leave in: Fructis Sleek & Shine (old), Gliss Ultimate Volume, various Elvive
Styler: Umberto Giannini jelly, Boots Essentials gel
Flour sack towel, pixie diffuse or air dry.
Experimenting with: benign neglect